Four days after the Duke and Duchess of Cambridge welcomed the new royal baby, Kensington Palace announced that the baby, the couple’s third child, will be known as ‘His Royal Highness Prince Louis of Cambridge’.

The official handle of Kensington Palace broke the news on Twitter and wrote, “The Duke and Duchess of Cambridge are delighted to announce that they have named their son Louis Arthur Charles. The baby will be known as His Royal Highness Prince Louis of Cambridge.”